/*
 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _LOS_DEVICELIMIT_PRI_H
#define _LOS_DEVICELIMIT_PRI_H

#include "los_plimits.h"

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */

#define DEVLIMIT_ACC_MKNOD 1
#define DEVLIMIT_ACC_READ  2
#define DEVLIMIT_ACC_WRITE 4
#define DEVLIMIT_ACC_MASK (DEVLIMIT_ACC_MKNOD | DEVLIMIT_ACC_READ | DEVLIMIT_ACC_WRITE)

#define DEVLIMIT_DEV_BLOCK 1
#define DEVLIMIT_DEV_CHAR  2
#define DEVLIMIT_DEV_ALL   4 /* all devices */

#define DEVLIMIT_ALLOW 1
#define DEVLIMIT_DENY 2

#define ACCLEN 4

typedef LOS_DL_LIST ListHead;

enum DevLimitBehavior {
    DEVLIMIT_DEFAULT_NONE,
    DEVLIMIT_DEFAULT_ALLOW,
    DEVLIMIT_DEFAULT_DENY,
};

typedef struct DevAccessItem {
    INT16 type;
    INT16 access;
    ListHead list;
    CHAR name[PATH_MAX];
} DevAccessItem;

typedef struct ProcDevLimiter {
    UINT8 allowFile;
    UINT8 denyFile;
    ListHead accessList; // device belong to devicelimiter
    enum DevLimitBehavior behavior;
} ProcDevLimiter;

extern ProcDevLimiter g_procDevLimiter;

ssize_t ProcDevLimiterWriteAllow(struct ProcFile *pf, const char *buf, size_t count, loff_t *ppos);
ssize_t ProcDevLimiterWriteDeny(struct ProcFile *pf, const char *buf, size_t count, loff_t *ppos);
ssize_t ProcDevLimiterShow(struct SeqBuf *m, void *v);
int DevLimitCheckPermission(int vnodeType, char *pathName, int flags);

void DevLimiterInit(void);
void *DevLimiterAlloc(void);
void DevLimiterCopy(UINT8 *dest, UINT8 *src);
void DevLimiterFree(struct ProcDirEntry *devPde);
#endif
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */

